package com.zjy.filter;

import com.zjy.pojo.User;
import com.zjy.util.Constants;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class SysFilter implements Filter {
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest)servletRequest;
        HttpServletResponse response=(HttpServletResponse)servletResponse;
        User user = (User)request.getSession().getAttribute(Constants.USER_SESSION);

        if(user==null){
            //已经被移除或者注销，或者未登录
            response.sendRedirect("/smbsm/error.jsp");
        }else{
            filterChain.doFilter(servletRequest,servletResponse);
        }
    }

    public void destroy() {

    }
}
